iMac: overheating display issues, symptoms, & a band-aid

The white iMacs (3+ years old, out of warranty) are starting to have overheating issues, symptoms include strange display issues- shapes, color-shifts, "smudges" and "tears" in the screen may flash or remain present. There is a utility that will help, and we are monitoring for any recalls or warranty exceptions issued by Apple. Please give us a call if you need help for this!